CN114293134A - Wear-resistant pin shaft and preparation method thereof - Google Patents
Wear-resistant pin shaft and preparation method thereof Download PDFInfo
- Publication number
- CN114293134A CN114293134A CN202111678235.2A CN202111678235A CN114293134A CN 114293134 A CN114293134 A CN 114293134A CN 202111678235 A CN202111678235 A CN 202111678235A CN 114293134 A CN114293134 A CN 114293134A
- Authority
- CN
- China
- Prior art keywords
- pin shaft
- nano ceramic
- wear
- preparing
- tio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 63
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims abstract description 21
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 239000002245 particle Substances 0.000 claims abstract description 20
- 239000007787 solid Substances 0.000 claims abstract description 11
- 238000005245 sintering Methods 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005524 ceramic coating Methods 0.000 claims abstract description 7
- 229910052593 corundum Inorganic materials 0.000 claims abstract description 7
- 238000001694 spray drying Methods 0.000 claims abstract description 7
- 229910001845 yogo sapphire Inorganic materials 0.000 claims abstract description 7
- 238000007751 thermal spraying Methods 0.000 claims abstract description 6
- 238000012545 processing Methods 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 claims description 26
- 239000000843 powder Substances 0.000 claims description 18
- 238000004544 sputter deposition Methods 0.000 claims description 15
- 238000005507 spraying Methods 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 6
- 238000005303 weighing Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000011230 binding agent Substances 0.000 claims description 5
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000002202 Polyethylene glycol Substances 0.000 claims description 3
- 239000002270 dispersing agent Substances 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 239000011858 nanopowder Substances 0.000 claims description 3
- 229920001223 polyethylene glycol Polymers 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 2
- 239000012298 atmosphere Substances 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims description 2
- 229910002804 graphite Inorganic materials 0.000 claims description 2
- 239000010439 graphite Substances 0.000 claims description 2
- 239000011261 inert gas Substances 0.000 claims description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 2
- 238000005299 abrasion Methods 0.000 claims 2
- 238000004519 manufacturing process Methods 0.000 claims 1
- 230000035515 penetration Effects 0.000 claims 1
- 239000011248 coating agent Substances 0.000 abstract description 3
- 238000000576 coating method Methods 0.000 abstract description 3
- 230000000181 anti-adherent effect Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 36
- 230000008569 process Effects 0.000 description 15
- 238000010791 quenching Methods 0.000 description 10
- 230000006698 induction Effects 0.000 description 8
- 230000000171 quenching effect Effects 0.000 description 8
- 238000012360 testing method Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000007750 plasma spraying Methods 0.000 description 6
- 239000002131 composite material Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 230000003746 surface roughness Effects 0.000 description 5
- 230000007704 transition Effects 0.000 description 5
- 230000007547 defect Effects 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229910052804 chromium Inorganic materials 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 1
- 238000000149 argon plasma sintering Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005261 decarburization Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000035553 feeding performance Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 238000007737 ion beam deposition Methods 0.000 description 1
- 238000001182 laser chemical vapour deposition Methods 0.000 description 1
- 238000004372 laser cladding Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000004549 pulsed laser deposition Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 238000005496 tempering Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Coating By Spraying Or Casting (AREA)
- Physical Vapour Deposition (AREA)
Abstract
The invention discloses a wear-resistant pin shaft which comprises a base body, wherein Al is arranged on the surface of the base body through a Ni/Al bonding layer2O3/TiO2A nano-ceramic layer of said Al2O3/TiO2The surface of the nano ceramic layer is provided with an Al-DLC film. The invention also discloses a preparation method of the wear-resistant pin shaft, which comprises the following steps: preparing nano ceramic slurry; carrying out spray drying on the nano ceramic slurry to obtain solid particles; sintering the solid particles at high temperature; preparing Ni/Al bonding layer and Al on the surface of a pin shaft substrate by adopting plasma thermal spraying2O3/TiO2A nano ceramic layer;processing the surface of the nano ceramic coating by using a machine tool; and preparing the Al-doped DLC film on the pin shaft processed by the machine tool. The pin shaft obtained by the preparation method fully combines the advantages of the nano ceramic and the DLC coating, has excellent anti-occlusion capability, anti-adhesive wear and sliding wear performance, and obviously prolongs the service life of the pin shaft under the swing working condition.
Description
Technical Field
The invention belongs to the technical field of engineering machinery parts, and particularly relates to a wear-resistant pin shaft and a preparation method thereof.
Background
The pin shaft in the engineering machinery mainly realizes different actions and transfers loads. At present, the pin shaft generally adopts an integral quenching and tempering process, and adopts an induction quenching and chromium plating surface modification process if the wear resistance is required. But easily adhere with the steel bushing of complex, interlock, lead to the wearing and tearing aggravation of round pin axle, and then lead to the cooperation clearance increase, reduce the vice life of friction.
The surface modification technology adopted by the pin shaft for the engineering machinery at present mainly comprises the processes of induction quenching, chromium plating, QPQ and the like. The wear-resistant layer of the pin shaft is prepared by induction quenching, and the method has the advantages of short process time, low cost and the like. After induction quenching of alloy steel such as 40Cr, 42CrMo and the like, the surface hardness is 50-55 HRC, the depth of a hardening layer is 2.0-4.0 mm, and the alloy steel is suitable for various working conditions. The chrome plating can be selected to have different thicknesses according to the stress of the pin shaft and the working position, and has excellent wear resistance and bearing performance. QPQ is subjected to salt bath nitrocarburizing and salt bath oxidation treatment, and then is subjected to a composite treatment technology of polishing and salt bath oxidation. After the alloy steel such as 40Cr, 42CrMo and the like is subjected to QPQ (quench Polish quench) process treatment, the surface hardness is more than or equal to 550HV, and the depth of a modified layer is 0.2-0.4 mm. Because the QPQ process forms a white and bright layer, the high-wear-resistant high-strength stainless steel pin roll has the characteristics of high bearing capacity and high wear resistance, and the corrosion resistance of the pin roll is obviously improved by the oxide film on the surface.
The pin shaft adopts induction quenching to prepare the modified layer, so that decarburization is easily caused when the process control is not good, the hardness of the surface of the pin shaft is reduced, and the wear resistance of the pin shaft is further reduced. Meanwhile, the surface quenching of the pin shaft only changes the organization structure of the surface of the pin shaft, and when the pin shaft is matched with a steel sleeve, the phenomena of locking and occlusion can be generated, so that severe adhesion and oxidative wear are caused, and the service life of a friction pair of the pin shaft sleeve is shortened. The round pin axle adopts QPQ technology to handle, and the bright layer receives the impact easy breakage under the impact condition, and broken bright layer adds the severe wear in the friction pair, leads to complex axle sleeve life to reduce.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a wear-resistant pin shaft and a preparation method thereof.
In order to solve the technical problem, the invention provides a wear-resistant pin shaft which comprises a base body, wherein the surface of the base body is provided with Al through a Ni/Al bonding layer2O3/TiO2A nano-ceramic layer of said Al2O3/TiO2The surface of the nano ceramic layer is provided with an Al-DLC film. The wear-resistant pin shaft is mainly applied to working devices such as excavators and loaders.
Further, the Al2O3/TiO2The nano ceramic layer comprises the following components in mass: al (Al)2O380-90%, the purity is more than or equal to 99%, and the particle size ranges from 40-90 nm; TiO2210-20%, purity not less than 92%, and granularity range 30-60 nm.
Further, in the Ni/Al bonding layer, the composition thereof contains, by mass: 88-90% of Ni, the purity is more than or equal to 99%, and the granularity ranges from-100 meshes to +150 meshes; al, the balance, the purity is more than or equal to 99 percent, and the granularity range is-100 to +200 meshes.
Further, the matrix is 45# steel, 40Cr or 42CrMo, and the Al is2O3/TiO2The thickness of the nano ceramic layer is 200-350 μm, and the surface hardness is 1000-1100 HV; the thickness of the Al-DLC film is 1-5 μm.
The invention also provides a preparation method of the wear-resistant pin shaft, which comprises the following steps:
preparing nano ceramic slurry;
carrying out spray drying on the nano ceramic slurry to obtain solid particles;
sintering the solid particles in a high-temperature furnace with an inert gas protection atmosphere;
preparing Ni/Al bonding layer and Al on the surface of a pin shaft substrate by adopting plasma thermal spraying2O3/TiO2A nano ceramic layer;
processing the surface of the nano ceramic coating by using a machine tool; the surface roughness of the coating is reduced, and the roughness is controlled between Ra1.6 and Ra6.3;
and preparing the Al-doped DLC film on the pin shaft machined by the machine tool by adopting magnetron sputtering equipment.
Further, the preparation method of the nano ceramic slurry comprises the following steps:
weighing Al according to the proportion of the components of the nano ceramic layer2O3And TiO2Preparing nano powder and slurry;
the method comprises the steps of oscillating the nano ceramic slurry for 10-30 min by adopting an ultrasonic oscillator, stirring the nano ceramic slurry for 2-6 h by using mechanical stirring, adding polyethylene glycol as a dispersing agent during stirring, wherein the solid content of the slurry is 30-39%, and the apparent density is 0.68-0.78 g/cm3The fluidity is 140-150 s/50 g;
1% polyvinyl alcohol was added as a binder. The binder can form a resin skeleton in the process of spray granulation to bond the nano ceramic particles. The flame flow of the plasma thermal spraying has high temperature and high speed, and the nano ceramic particles are difficult to convey into the flame flow, so that the nano ceramic particles need to be reconstructed into micron-sized feed.
Further, the inlet temperature of the spray drying is 200-240 ℃, the outlet temperature is 10-100 ℃, and the fan is 40-50 m3Per hour, the creep amount is 40-75 ml/h, and the needle is passed for 5-9 times/h. The feed was largely freed of deionized water to obtain solid particles.
Further, the sintering temperature is 1200-1250 ℃, and the sintering time is 2-3 h. The solid particles obtained by spray drying have weak binding force and low strength, and are easy to disperse when directly used for spraying in flame flow. Residual moisture and binder in the feed are removed by high-temperature sintering, so that the density and bonding strength of the nano particles are improved.
Further, the spraying voltage of the plasma thermal spraying is 45-75V, the spraying distance is 60-90 mm, and the powder feeding amount is 7-9 g/L.
Further, the preparation method of the DLC film comprises the following steps:
vertically placing the pin shaft on a tool, wherein the working surface of the pin shaft cannot be contacted with the tool;
vacuumizing in the vacuum cavity, firstly adopting a mechanical pump to pre-vacuumize to below 10Pa, and then adopting a molecular pump to vacuumize to ensure that the vacuum of the cavity reaches 5 multiplied by 10-4～7×10-4Pa；
Starting target sources of graphite and Al, adjusting the power of the two target sources to sputter and prepare the Al-DLC film, wherein the sputtering pressure is 0.5-0.7 Pa, the substrate temperature is 150-180 ℃, the substrate bias voltage is-100 to-120V, the sputtering time is 45-70 min, and the radio frequency power is 100-200W;
and after sputtering is finished, closing the radio frequency power supply, cooling to room temperature, opening an air release valve, balancing pressure, and taking out the pin shaft sample.
SP in DLC film3The existence of the hybrid structure can improve the hardness of the film, but the film structure is in an over-constrained state, and the thickness and the stability of the DLC film are limited by the large stress in the film. The doped Al metal can be non-uniformly distributed in the DLC film in the forms of atomic solid solution, nanocrystalline and the like, the fracture toughness of the film can be greatly improved, and the DLC film can be suitable for large-load working conditions.
The invention can also prepare a nano ceramic layer on the surface of the pin shaft by means of laser cladding, sintering, CVD and the like, and can also prepare a DLC film by methods of ion beam deposition, pulsed laser deposition plasma enhanced chemical vapor deposition and the like.
The invention achieves the following beneficial effects:
the wear-resistant pin shaft provided by the invention has excellent comprehensive mechanical properties, the nano ceramic has high hardness and high wear resistance, the Al-doped DLC film has the characteristics of wear resistance and low friction coefficient, and the process is fully combined with the characteristics of the nano ceramic and the DLC film, and is suitable for the working conditions of high wear resistance and high load of engineering machinery.
The main advantages of the pin shaft provided by the invention include: 1) the stability is high, the nano ceramic layer and the DLC coating both have the characteristics of high hardness and high wear resistance, the DLC film can obviously reduce the friction coefficient of a friction pair in the friction process, the anti-cracking toughness of the DLC film after Al doping can be enhanced, and the DLC film can be mixed with Al2O3/TiO2The bonding strength of the nano ceramic is also obviously improved, and the stability of the pin shaft in the using process is improved; 2) high bonding strength, and the invention adopts self-adhesionThe Ni/Al composite powder is a bonding layer material and is used as a transition layer between the nano ceramic layer and the substrate, so that the bonding strength between the nano ceramic layer and the substrate is remarkably improved, and the nano ceramic layer is also used as a transition layer of the Al-DLC film, so that the bonding strength between the nano ceramic layer and the Al-DLC is also enhanced.
The pin shaft provided by the invention has the characteristics of high hardness and high wear resistance, and has application value under working conditions of silt, ocean and the like because the nano ceramic layer and the DLC film layer have excellent corrosion resistance.
Drawings
Fig. 1 is a schematic structural view of a wear-resistant pin shaft according to the present invention;
in FIG. 1, Al-DLC film, 2, AlO3/TiO2 nano ceramic layer, 3, Ni/Al adhesive layer, 4, substrate.
Fig. 2 is a process flow diagram of a wear-resistant pin shaft according to the present invention.
FIG. 3 shows the appearance of grinding marks on the surface of the pin shaft by different surface modification processes; (a) nano ceramic + DLC film, (b) induction hardening, (c) QPQ.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
Example 1
The high-wear-resistance pin shaft in the embodiment is prepared by weighing the nano ceramic powder group and Al according to the mass2O387% of powder, 99.2% of purity, 60nm of particle size and TiO2The powder accounts for 13 percent, the purity is 95 percent, and the particle size diameter is 40 nm. The self-adhesive Ni/Al composite powder between the nano ceramic and the substrate is a bonding layer material, and the Ni content is 90 percent, the Al content is 10 percent, and the bonding layer material is 100 meshes. Weighing Al2O3And TiO2The nanopowder is configured as a slurry. And (3) oscillating the nano ceramic slurry for 15min by adopting an ultrasonic oscillator, stirring the nano ceramic slurry for 3h by using mechanical stirring, and adding polyethylene glycol as a dispersing agent during stirring. The solid content of the slurry is 35 percent, and the apparent density is 0.72g/cm3The fluidity is 140s/50g, and 1 percent is added simultaneouslyAs a binder. And (3) carrying out spray drying on the slurry, and then sintering at the high temperature of 1200 ℃ for 2h to prepare the micron-sized feed. The obtained feeding performance is as follows: loose density 0.70g/cm3185s/50g of fluidity and 0.89g/cm of tap density3。
In order to enhance the bonding strength of the nano ceramic coating and the substrate, a 50-micron-thick Ni/Al transition layer is prepared on the surface of the pin shaft by adopting plasma spraying. Then, a nano ceramic coating with the thickness of 300 mu m is prepared by adopting plasma spraying, and the process parameters are that the spraying voltage is 50V, the spraying distance is 70mm, and the powder feeding amount is 8 g/L. The nano ceramic has no defects of pores, cracks and the like, the average hardness of the surface of the nano ceramic is 1050HV0.1, and the fracture toughness Gc value is 3.98J/m-2。
And (3) machining the surface of the nano ceramic by using a machine tool, wherein the surface roughness is Ra3.2.
And cleaning and drying the pin shaft processed by the machine tool, and putting the pin shaft into a magnetron sputtering device. The Al-doped DLC film is prepared by a co-sputtering method, wherein the technological parameters are sputtering pressure of 0.5Pa, substrate temperature of 160 ℃, substrate bias voltage of-110V, sputtering time of 60min and radio frequency power of 120W. The Al-DLC film had a thickness of 3 μm, a hardness of 12.16GPa, an elastic modulus of 214.65GPa, and a critical load of 39.68N.
Example 2
The high-wear-resistance pin shaft in the embodiment is prepared by weighing the nano ceramic powder group and Al according to the mass2O380% of powder, 99.2% of purity, 60nm of particle size and TiO220% of powder, 95% of purity and 40nm of particle size. The self-adhesive Ni/Al composite powder between the nano ceramic and the substrate is a bonding layer material, and the Ni content is 89 percent, and the Al content is 11 percent, which are all-100 meshes. Al preparation according to the Process flow and parameters of example 12O3/TiO2And (5) feeding the nano ceramic.
And preparing a 50-micron-thick Ni/Al transition layer on the surface of the pin shaft by adopting plasma spraying. Then, a nano ceramic coating with the thickness of 200 mu m is prepared by adopting plasma spraying, wherein the technological parameters are that the spraying voltage is 45V, the spraying distance is 70mm, and the powder feeding amount is 7 g/L. The nano ceramic has no defects of pores, cracks and the like, the average hardness of the surface of the nano ceramic is 1026HV0.1, and the fracture toughness Gc value is 4.09J/m-2。
And (3) machining the surface of the nano ceramic by using a machine tool, wherein the surface roughness is Ra3.2.
And cleaning and drying the pin shaft processed by the machine tool, and putting the pin shaft into a magnetron sputtering device. The Al-doped DLC film is prepared by a co-sputtering method, wherein the technological parameters are sputtering pressure of 0.5Pa, substrate temperature of 150 ℃, substrate bias voltage of-100V, sputtering time of 45min and radio frequency power of 100W. The Al-DLC film had a thickness of 1 μm, a hardness of 11.37GPa, an elastic modulus of 212.35GPa, and a critical load of 35.42N.
Example 3
The high-wear-resistance pin shaft in the embodiment is prepared by weighing the nano ceramic powder group and Al according to the mass2O3Powder content of 90%, purity of 99.2%, particle size diameter of 60nm, TiO2The powder accounts for 10 percent, the purity is 95 percent, and the particle size diameter is 40 nm. The self-adhesive Ni/Al composite powder between the nano ceramic and the substrate is a bonding layer material, the Ni content is 88 percent, and the particle size is 150 meshes; the Al content is 12 percent and the grain size is 200 meshes. Al preparation according to the Process flow and parameters of example 12O3/TiO2And (5) feeding the nano ceramic.
And preparing a 50-micron-thick Ni/Al transition layer on the surface of the pin shaft by adopting plasma spraying. Then, plasma spraying is adopted to prepare a nano ceramic coating with the thickness of 350 mu m, and the technological parameters are spraying voltage of 75V, spraying distance of 70mm and powder feeding amount of 9 g/L. The nano ceramic has no defects of pores, cracks and the like, the average hardness of the surface of the nano ceramic is 1089HV0.1, and the Gc value of the fracture toughness is 3.84J/m-2。
And (3) machining the surface of the nano ceramic by using a machine tool, wherein the surface roughness is Ra3.2.
And cleaning and drying the pin shaft processed by the machine tool, and putting the pin shaft into a magnetron sputtering device. The Al-doped DLC film is prepared by a co-sputtering method, wherein the technological parameters are sputtering pressure of 0.7Pa, substrate temperature of 180 ℃, substrate bias voltage of-120V, sputtering time of 70min and radio frequency power of 200W. The Al-DLC film had a thickness of 5 μm, a hardness of 13.41GPa, an elastic modulus of 215.03GPa, and a critical load of 41.12N.
And (3) testing the frictional wear performance:
the frictional wear performance was performed using a pin and disc wear test. The dimensional requirements of the test piece are as follows: the dimensions were (10.0X 20.0) mm. The requirements on the grinding ball are as follows: the material is WC, the diameter is 5mm, and the surface roughness is Ra0.8. The test conditions are as follows: a constant speed and constant load test is adopted, the test time is 60min, the test force is 20N, and the rotating speed is 200 r/min.
TABLE 1 results of frictional wear Performance test
| Examples | Coefficient of friction | Amount of wear (unit g) | Grinding crack width (Unit μm) |
| Example 1 | 0.10～0.15 | 0.0359 | 413.28 |
| Example 2 | 0.14～0.17 | 0.0486 | 498.54 |
| Example 3 | 0.12～0.16 | 0.0428 | 467.32 |
| Induction hardening | 0.20～0.24 | 0.0785 | 629.13 |
| QPQ | 0.16～0.19 | 0.0624 | 527.82 |
The wear-resistant pin shafts in the embodiments 1 to 3 are excellent in overall mechanical property, and the wear resistance and the self-lubricating property of the wear-resistant pin shafts are far higher than those of the conventional pin shaft in induction quenching and QPQ treatment. The friction coefficient is low, and the steel shaft sleeve and the friction coefficient are not occluded and adhered, so that the performance requirement of the engineering machinery working device on the pin shaft is met. The method fully combines the advantages of the nano ceramic and the Al-DLC film, the bonding strength between the modified layers is high, and the fracture toughness of the Al-DLC film is superior to that of a pure DLC film.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The wear-resistant pin shaft is characterized by comprising a base body, wherein the surface of the base body is provided with Al through a Ni/Al bonding layer2O3/TiO2A nano-ceramic layer of said Al2O3/TiO2The surface of the nano ceramic layer is provided with an Al-DLC film.
2. A wear resistant pin shaft as claimed in claim 1, wherein said Al is2O3/TiO2The nano ceramic layer comprises the following components in mass: al (Al)2O380-90%, the purity is more than or equal to 99%, and the particle size ranges from 40-90 nm; TiO2210-20%, purity not less than 92%, and granularity range 30-60 nm.
3. The wear-resistant pin shaft of claim 1, wherein the Ni/Al bonding layer comprises, by mass: 88-90% of Ni, more than or equal to 99% of purity, and the granularity range of-100 to +150 meshes; al, the balance, the purity is more than or equal to 99 percent, and the granularity ranges from-100 to +200 meshes.
4. The wear resistant pin shaft of claim 1 wherein said substrate is 45# steel, 40Cr or 42CrMo, said Al2O3/TiO2The thickness of the nano ceramic layer is 200-350 μm, and the surface hardness is 1000-1100 HV; the thickness of the Al-DLC film is 1-5 μm.
5. A method of making a wear resistant pin according to any one of claims 1 to 4 comprising:
preparing nano ceramic slurry;
carrying out spray drying on the nano ceramic slurry to obtain solid particles;
sintering the solid particles in a high-temperature furnace with an inert gas protection atmosphere;
preparing Ni/Al bonding layer and Al on the surface of a pin shaft substrate by adopting plasma thermal spraying2O3/TiO2A nano ceramic layer;
processing the surface of the nano ceramic coating by using a machine tool;
and preparing the Al-doped DLC film on the pin shaft machined by the machine tool by adopting magnetron sputtering equipment.
6. The method for preparing a wear-resistant pin shaft according to claim 5, wherein the method for preparing the nano ceramic slurry comprises the following steps:
weighing Al according to the proportion of the components of the nano ceramic layer2O3And TiO2Preparing nano powder and slurry;
the method comprises the steps of oscillating the nano ceramic slurry for 10-30 min by adopting an ultrasonic oscillator, stirring the nano ceramic slurry for 2-6 h by using mechanical stirring, adding polyethylene glycol as a dispersing agent during stirring, wherein the solid content of the slurry is 30-39%, and the apparent density is 0.68-0.78 g/cm3The fluidity is 140-150 s/50 g;
1% polyvinyl alcohol was added as a binder.
7. The method for preparing the wear-resistant pin shaft according to claim 5, wherein the spray drying is carried out at an inlet temperature of 200-240 ℃, an outlet temperature of 10-100 ℃, a fan of 40-50 m for carrying out labor/hour, a creep amount of 40-75 ml/hour and a needle penetration rate of 5-9 times/hour.
8. The method for preparing the abrasion-resistant pin shaft according to claim 5, wherein the sintering temperature is 1200-1250 ℃ and the sintering time is 2-3 h.
9. The method for preparing the abrasion-resistant pin shaft according to claim 5, wherein the spraying voltage of the plasma thermal spraying is 45-75V, the spraying distance is 60-90 mm, and the powder feeding amount is 7-9 g/L.
10. The method for preparing a wear-resistant pin shaft according to claim 5, wherein the DLC film is prepared by the following steps:
vertically placing the pin shaft on a tool, wherein the working surface of the pin shaft cannot be contacted with the tool;
vacuumizing in the vacuum cavity, firstly adopting a mechanical pump to pre-vacuumize to below 10Pa, and then adopting a molecular pump to vacuumize to ensure that the vacuum of the cavity reaches 5 multiplied by 10-4~7×10-4Pa；
Starting target sources of graphite and Al, adjusting the power of the two target sources to sputter and prepare the Al-DLC film, wherein the sputtering pressure is 0.5-0.7 Pa, the substrate temperature is 150-180 ℃, the substrate bias voltage is-100 to-120V, the sputtering time is 45-70 min, and the radio frequency power is 100-200W;
and after sputtering is finished, closing the radio frequency power supply, cooling to room temperature, opening an air release valve, balancing pressure, and taking out the pin shaft sample.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111678235.2A CN114293134A (en) | 2021-12-31 | 2021-12-31 | Wear-resistant pin shaft and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111678235.2A CN114293134A (en) | 2021-12-31 | 2021-12-31 | Wear-resistant pin shaft and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114293134A true CN114293134A (en) | 2022-04-08 |
Family
ID=80975256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111678235.2A Pending CN114293134A (en) | 2021-12-31 | 2021-12-31 | Wear-resistant pin shaft and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114293134A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07228962A (en) * | 1994-02-21 | 1995-08-29 | Kyocera Corp | Hard layer-coated member |
| DE102004054193A1 (en) * | 2004-11-10 | 2006-06-01 | Thomas Kronenberger | Hard coating on any, preferably flexible substrate, comprising at least two morphologically different layers useful in applications involving friction pairs has outer layer comprising hard layer of amorphous, diamond-like carbon (DLC) |
| US20060269704A1 (en) * | 2005-05-28 | 2006-11-30 | Hon Hai Precision Industry Co., Ltd. | Enclosure for portable electronic device and method for making the same |
| EP2206800A1 (en) * | 2008-12-26 | 2010-07-14 | Hitachi Ltd. | Slide member |
| CN102650029A (en) * | 2012-04-25 | 2012-08-29 | 常州大学 | Preparation method for nanometer ceramic composite coating material on surface of hot work die steel |
| JP2018146108A (en) * | 2017-03-07 | 2018-09-20 | Ntn株式会社 | Rolling bearing and its manufacturing method |
| CN110218971A (en) * | 2019-07-02 | 2019-09-10 | 重庆文理学院 | A kind of nano-multilayer film and preparation method thereof suitable for titanium alloy surface |
-
2021
- 2021-12-31 CN CN202111678235.2A patent/CN114293134A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07228962A (en) * | 1994-02-21 | 1995-08-29 | Kyocera Corp | Hard layer-coated member |
| DE102004054193A1 (en) * | 2004-11-10 | 2006-06-01 | Thomas Kronenberger | Hard coating on any, preferably flexible substrate, comprising at least two morphologically different layers useful in applications involving friction pairs has outer layer comprising hard layer of amorphous, diamond-like carbon (DLC) |
| US20060269704A1 (en) * | 2005-05-28 | 2006-11-30 | Hon Hai Precision Industry Co., Ltd. | Enclosure for portable electronic device and method for making the same |
| EP2206800A1 (en) * | 2008-12-26 | 2010-07-14 | Hitachi Ltd. | Slide member |
| CN102650029A (en) * | 2012-04-25 | 2012-08-29 | 常州大学 | Preparation method for nanometer ceramic composite coating material on surface of hot work die steel |
| JP2018146108A (en) * | 2017-03-07 | 2018-09-20 | Ntn株式会社 | Rolling bearing and its manufacturing method |
| CN110218971A (en) * | 2019-07-02 | 2019-09-10 | 重庆文理学院 | A kind of nano-multilayer film and preparation method thereof suitable for titanium alloy surface |
Non-Patent Citations (4)
| Title |
|---|
| G. BOLELLI ET AL.: ""Enhanced tribological properties of PECVD DLC coated thermally sprayed coatings"", pages 4382 - 4386 * |
| JI CHENG DING ET AL.: ""Microstructure and wettability of novel Al-containing diamond-like carbon films deposited by a hybrid sputtering system"", pages 1 - 8 * |
| 王海军等: "《热喷涂材料及应用》", 国防工业出版社, pages: 196 - 198 * |
| 邸英浩等: ""等离子喷涂纳米结构Al2O3/TiO2 涂层的组织与性能研究"", pages 10 - 12 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105386049B (en) | A kind of method for preparing gradient hard composite coating in carbide surface | |
| CN109023342B (en) | Gradient ceramic coating micro-texture self-lubricating cutter and preparation method thereof | |
| CN114107715B (en) | FeCoCrNiMo-based high-entropy alloy composite material and preparation method and application thereof | |
| CN108149183B (en) | Hard alloy with surface hardness in gradient distribution and preparation method thereof | |
| CN109881109B (en) | Laser cladding material and preparation method of laser cladding coating | |
| CN102021513B (en) | High-tenacity oxidation-resistant anti-friction coating on substrate surface and preparation method thereof | |
| CN102732833A (en) | Gamma-TiAl alloy surface high temperature oxidation resistance and wear resistance coat, and preparation method thereof | |
| CN112063958A (en) | Reciprocating pump plunger coated with amorphous alloy coating and processing technology thereof | |
| CN109913868B (en) | Hole array steel surface composite coating and preparation method thereof | |
| CN110453219B (en) | Method for enhancing surface performance of agricultural machinery transmission component | |
| CN108950537B (en) | Cubic boron nitride self-lubricating coating cutter and preparation method thereof | |
| CN103160724B (en) | A kind of Wimet for cast iron turnery processing and hard alloy coated blade thereof | |
| CN110241412A (en) | A kind of laminated coating self-lubricating bearing and preparation method thereof | |
| CN108330429B (en) | Molybdenum disilicide composite coating and preparation method thereof | |
| CN109267062A (en) | A kind of niobium alloy surface MoSi2The preparation method of coating | |
| CN114293134A (en) | Wear-resistant pin shaft and preparation method thereof | |
| CN114318263B (en) | Oxidation-resistant, wear-resistant and antifriction gradient nano metal coating and preparation method thereof | |
| CN108588655A (en) | A kind of ternary boride composite coating layer cutter and preparation method thereof | |
| CN115386786B (en) | Method for enhancing bonding strength of ceramic particles and matrix | |
| CN108588628B (en) | High-speed die cutting tool surface gradient coating and preparation process thereof | |
| CN105951047A (en) | Preparation method for tungsten-nickel alloy with nitrogen-yttrium-zirconium hard coating | |
| CN105154835B (en) | A kind of γ TiAl alloys surface abrasion resistance damage protective coating and preparation method thereof | |
| Jiang et al. | The role of SiCw in the microstructure and properties of WC-9Co gradient cemented carbide | |
| CN109536942B (en) | Laser cladding surface strengthening method for electric power connecting fitting | |
| CN102644048B (en) | Preparing process for bionic molybdenum silicide gradient laminate compositing nanometer coatings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220408 |